OP CONCHOLOGY. 219 



been an accidentally introduced colony, as the locality has since 

 been carefully searched in vain. 



Note. — The following corrections are required in my article 

 printed in vol. iv, 4, p. 209, &c. : 



P. 209, line 16. For calhsi tateni ; tenui ; read callositata 

 tenui. 



P. 215, line 15 from bottom, at end. Add form as in. 



P. 226, line 20. For cross read crop. 



P. 232, line 17 from bottom. After mou7itains add southward. 



P. 233, line 5. For distinction read distribution. 



P. 235, line 5. For the read that. 



P. 236, at bottom. Add 216. 



P. 240, line 11. For the sign || read =. 



In some, if not all copies of the map, most of the signs used 

 are very faintly printed, if not omitted entirely. The localities 

 may usually be determined by the context. 



